de digitale thermometer DS18B20 biedt temperatuurmetingen van 9 tot 12 bit Celsius en heeft een alarmfunctie met niet-vluchtige, door de gebruiker programmeerbare bovenste en onderste triggerpunten.
RTD (Resistance Temperature Detector) is a sensor whose resistance changes as its temperature changes. The resistance increases as the temperature of the sensor increases. The resistance vs temperature relationship is well known and is repeatable over time. An RTD is a passive device. It does not produce an output on its own. External electronic devices are used to measure the resistance of the sensor by passing a small electrical current through the sensor to generate a voltage. Typically 1 mA or less measuring current, 5 mA maximum without the risk of self-heating.
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